0000001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - STATEMENTS OF INCOME (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - STATEMENTS OF CASH FLOWS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - BALANCE SHEETS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 9952155 - Disclosure - Management's Opinion link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Accounting Pronouncements link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Selected Balance Sheet Data link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Borrowings and Other Financing Instruments link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Revenues link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Fair Value of Financial Assets and Liabilities link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Benefit Plans and Other Postretirement Benefits link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Selected Balance Sheet Data (Tables) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Borrowings and Other Financing Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Revenues (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Fair Value of Financial Assets and Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Benefit Plans and Other Postretirement Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Selected Balance Sheet Data Accounts Receivable, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Selected Balance Sheet Data Selected Balance Sheet Data Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Selected Balance Sheet Data Balance Sheet Related Disclosures, Property, Plant and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Borrowings and Other Financing Instruments - Money Pool (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Borrowings and Other Financing Instruments - Commercial Paper (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Borrowings and Other Financing Instruments - Letters of Credit (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Borrowings and Other Financing Instruments - Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Borrowings and Other Financing Instruments - Long-Term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Revenues (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Fair Value of Financial Assets and Liabilities - Commodity Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Fair Value of Financial Assets and Liabilities - Consideration of Credit Risk Concentrations (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Fair Value of Financial Assets and Liabilities - Impact of Derivative Activities on Income and Accumulated Other Comprehensive Loss (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Fair Value of Financial Assets and Liabilities - Recurring Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Fair Value of Financial Assets and Liabilities - Fair Value of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Fair Value of Financial Assets and Liabilities - Interest Rate Derivatives (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Benefit Plans and Other Postretirement Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Commitments and Contingencies - SPP OATT Upgrade Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Commitments and Contingencies - Environmental (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Commitments and Contingencies - Variable Interest Entities (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Commitment and Contingencies - Smokehouse Creek Complex (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Segment Reporting (Details) link:presentationLink link:calculationLink link:definitionLink